Set field [count_field; count_field + 1]
count_field is a number field used to store the number of clicks
Thanks for the suggestion - I've been out of town for the past 10 days with no computer so I haven't been able to try it out yet. Will let you know when I get back.
I use the above method all the time in one of my solutions.
I also use:
Set Field [ Table::field ; table::Field + Get ( ScriptParameter ) ]
so that I can pass 1 as the parameter for one button to increment it and -1 as the script parameter with a second button to decrement it.